As a language learner I have some alternatives: Use HelloChinese for Chinese. And for flashcards you can use Anki where you can add your own flashcards. You can download flashcards made by others as well. There’s a great Chinese flashcard map I use, which also has sound. Quizlet is also good, but not as good as Anki, but it lets you see flashcards made by others more easily.

And there are a ton of websites for each language that let you see the dictionary, grammar rules, and other stuff. Even for obscure languages like Greenlandic